Doug Ensley

Professor of Mathematics

Shippensburg University


Discrete Mathematics
MAT 225

Errors in the book
Please send any additional errors to me by e-mail and I will add them to the list.
Course Syllabus
Policies, contact information, and important dates.
Course Assignments
Problems from the book you should complete.
Desire2Learn site

Used for copies of handouts, powerpoint slides, and gradebook

Interactive Material
Indexed to the sections of the book, these pages provide interactive examples and immediate feedback on understanding of the material.
Textbook Site
Discrete Mathematics: Mathematical Reasoning and Proof with Puzzles, Patterns and Games by D. Ensley & W. Crawley, published by John Wiley and Sons.
For more details, contact me by sending e-mail to or by using the information at the right. Doug Ensley
Department of Mathematics
Shippensburg University
Shippensburg, PA 17257

Phone: (717) 477-1431
Fax: (717) 477-4009

The site is maintained by Doug Ensley, who is solely responsible for its content.